yield-star-sync-throw.js (6022B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/async-generators/yield-star-sync-throw.case 4 // - src/async-generators/default/async-expression.template 5 /*--- 6 description: execution order for yield* with sync iterator and throw() (Unnamed async generator expression) 7 esid: prod-AsyncGeneratorExpression 8 features: [Symbol.iterator, async-iteration] 9 flags: [generated, async] 10 info: | 11 Async Generator Function Definitions 12 13 AsyncGeneratorExpression : 14 async [no LineTerminator here] function * BindingIdentifier ( FormalParameters ) { 15 AsyncGeneratorBody } 16 17 18 YieldExpression: yield * AssignmentExpression 19 20 ... 21 6. Repeat 22 ... 23 b. Else if received.[[Type]] is throw, then 24 i. Let throw be ? GetMethod(iterator, "throw"). 25 ii. If throw is not undefined, then 26 1. Let innerResult be ? Call(throw, iterator, « received.[[Value]] »). 27 2. If generatorKind is async, then set innerResult to 28 ? Await(innerResult). 29 ... 30 5. Let done be ? IteratorComplete(innerResult). 31 6. If done is true, then 32 a. Return ? IteratorValue(innerResult). 33 7. Let received be GeneratorYield(innerResult). 34 ... 35 36 %AsyncFromSyncIteratorPrototype%.throw ( value ) 37 38 ... 39 5. Let throw be GetMethod(syncIterator, "throw"). 40 ... 41 8. Let throwResult be Call(throw, syncIterator, « value »). 42 ... 43 11. Let throwValue be IteratorValue(throwResult). 44 ... 45 13. Let throwDone be IteratorComplete(throwResult). 46 ... 47 16. Perform ! Call(valueWrapperCapability.[[Resolve]], undefined, 48 « throwValue »). 49 ... 50 18. Set onFulfilled.[[Done]] to throwDone. 51 19. Perform ! PerformPromiseThen(valueWrapperCapability.[[Promise]], 52 onFulfilled, undefined, promiseCapability). 53 ... 54 55 ---*/ 56 var log = []; 57 var obj = { 58 [Symbol.iterator]() { 59 var throwCount = 0; 60 return { 61 name: "syncIterator", 62 get next() { 63 log.push({ name: "get next" }); 64 return function() { 65 return { 66 value: "next-value-1", 67 done: false 68 }; 69 }; 70 }, 71 get throw() { 72 log.push({ 73 name: "get throw", 74 thisValue: this 75 }); 76 return function() { 77 log.push({ 78 name: "call throw", 79 thisValue: this, 80 args: [...arguments] 81 }); 82 83 throwCount++; 84 if (throwCount == 1) { 85 return { 86 name: "throw-result-1", 87 get value() { 88 log.push({ 89 name: "get throw value (1)", 90 thisValue: this 91 }); 92 return "throw-value-1"; 93 }, 94 get done() { 95 log.push({ 96 name: "get throw done (1)", 97 thisValue: this 98 }); 99 return false; 100 } 101 }; 102 } 103 104 return { 105 name: "throw-result-2", 106 get value() { 107 log.push({ 108 name: "get throw value (2)", 109 thisValue: this 110 }); 111 return "throw-value-2"; 112 }, 113 get done() { 114 log.push({ 115 name: "get throw done (2)", 116 thisValue: this 117 }); 118 return true; 119 } 120 }; 121 }; 122 } 123 }; 124 } 125 }; 126 127 128 129 var callCount = 0; 130 131 var gen = async function *() { 132 callCount += 1; 133 log.push({ name: "before yield*" }); 134 var v = yield* obj; 135 log.push({ 136 name: "after yield*", 137 value: v 138 }); 139 return "return-value"; 140 141 }; 142 143 var iter = gen(); 144 145 assert.sameValue(log.length, 0, "log.length"); 146 147 iter.next().then(v => { 148 assert.sameValue(log[0].name, "before yield*"); 149 150 assert.sameValue(log[1].name, "get next"); 151 152 assert.sameValue(v.value, "next-value-1"); 153 assert.sameValue(v.done, false); 154 155 assert.sameValue(log.length, 2, "log.length"); 156 157 iter.throw("throw-arg-1").then(v => { 158 assert.sameValue(log[2].name, "get throw"); 159 assert.sameValue(log[2].thisValue.name, "syncIterator", "get throw thisValue"); 160 161 assert.sameValue(log[3].name, "call throw"); 162 assert.sameValue(log[3].thisValue.name, "syncIterator", "throw thisValue"); 163 assert.sameValue(log[3].args.length, 1, "throw args.length"); 164 assert.sameValue(log[3].args[0], "throw-arg-1", "throw args[0]"); 165 166 assert.sameValue(log[4].name, "get throw done (1)"); 167 assert.sameValue(log[4].thisValue.name, "throw-result-1", "get throw done thisValue"); 168 169 assert.sameValue(log[5].name, "get throw value (1)"); 170 assert.sameValue(log[5].thisValue.name, "throw-result-1", "get throw value thisValue"); 171 172 assert.sameValue(v.value, "throw-value-1"); 173 assert.sameValue(v.done, false); 174 175 assert.sameValue(log.length, 6, "log.length"); 176 177 iter.throw().then(v => { 178 assert.sameValue(log[6].name, "get throw"); 179 assert.sameValue(log[6].thisValue.name, "syncIterator", "get throw thisValue"); 180 181 assert.sameValue(log[7].name, "call throw"); 182 assert.sameValue(log[7].thisValue.name, "syncIterator", "throw thisValue"); 183 assert.sameValue(log[7].args.length, 1, "throw args.length"); 184 assert.sameValue(log[7].args[0], undefined, "throw args[0]"); 185 186 assert.sameValue(log[8].name, "get throw done (2)"); 187 assert.sameValue(log[8].thisValue.name, "throw-result-2", "get throw done thisValue"); 188 189 assert.sameValue(log[9].name, "get throw value (2)"); 190 assert.sameValue(log[9].thisValue.name, "throw-result-2", "get throw value thisValue"); 191 192 assert.sameValue(log[10].name, "after yield*"); 193 assert.sameValue(log[10].value, "throw-value-2"); 194 195 assert.sameValue(v.value, "return-value"); 196 assert.sameValue(v.done, true); 197 198 assert.sameValue(log.length, 11, "log.length"); 199 }).then($DONE, $DONE); 200 }).catch($DONE); 201 }).catch($DONE); 202 203 assert.sameValue(callCount, 1);